Taiwan Semiconductor Corporation ES3AHR7G

Overview

ES3AHR7G from Taiwan Semiconductor is a 3 A, 50 V super fast recovery surface-mount rectifier in DO-214AB (SMC) package, featuring 35 ns reverse recovery time, 0.95 V max forward voltage at 3 A, and 100 A peak surge current - used in high-frequency freewheeling and SMPS output rectification in telecom power supplies.

For engineers reviewing the ES3AHR7G datasheet, ES3AHR7G pinout, ES3AHR7G application, or ES3AHR7G equivalent, key selection criteria include reverse recovery speed, thermal resistance (R_θJL = 12 °C/W), junction temperature rating (–55 to +150 °C), and RoHS/halogen-free compliance for industrial-grade power conversion designs.

Technical Context

This single-die, unidirectional silicon rectifier uses glass-passivated junction technology to achieve stable performance under repetitive surge conditions. Its 35 ns trr enables efficient operation in switching frequencies up to several hundred kHz, with low stored charge minimizing switching losses in flyback and forward converters.

The device operates across –55 °C to +150 °C junction temperature range and exhibits 10 µA max reverse leakage at 25 °C and rated V_RRM, supporting reliable DC output stage rectification where thermal management and fast transient response are critical.

Key Specifications

Pinout & Package

Package: DO-214AB (SMC), surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band; weight ≈ 0.210 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar super fast rectifier applications.

Compared with VS-3EYH01-M3/54 and MUR350G, ES3AHR7G offers identical electrical performance in a standard SMT package with Level 1 MSL rating - making it optimal for high-volume automated production where moisture sensitivity and assembly yield are critical.

Availability

ES3AHR7G is available at Aetrix Electronics and suitable for telecom AC/DC adapters, industrial PLC power supplies, and LED driver output rectification requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.

Supply support for ES3AHR7G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS devices, and MOSFETs for industrial and computing markets.

The ES3x series was developed specifically for high-frequency, high-reliability rectification in space-constrained SMPS and converter applications - emphasizing fast recovery, thermal robustness, and SMT manufacturability.

FAQ

What is the maximum junction temperature rating for ES3AHR7G?

The ES3AHR7G has a maximum junction temperature (T_J) of +150 °C and a minimum of –55 °C. This wide operating range supports deployment in thermally demanding environments such as enclosed industrial power supplies or high-ambient-temperature LED drivers. The device's R_θJL of 12 °C/W enables effective heat dissipation to the PCB, helping maintain safe T_J under full 3 A load. Always verify thermal design using actual board layout and airflow conditions for ES3AHR7G.

Is ES3AHR7G RoHS and halogen-free compliant?

Yes, ES3AHR7G is fully RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound and plating meet environmental requirements for consumer, industrial, and telecom equipment. This compliance is verified in Taiwan Semiconductor's official documentation (Version N2102) and confirmed on authorized distributor listings. Designers can confidently specify ES3AHR7G for export-bound products requiring strict substance restrictions.

What does the 'R7G' suffix in ES3AHR7G indicate?

The 'R7G' suffix in ES3AHR7G denotes tape-and-reel packaging: 'R' = reel, '7' = 3,000 units per reel, and 'G' = green (halogen-free) compound. This matches Taiwan Semiconductor's ordering code convention for the ES3x family. The base device remains electrically identical to ES3A - 50 V V_RRM, 3 A I_F, 35 ns t_rr. No parameter deviation is introduced by the R7G suffix; it solely specifies packaging and material compliance for ES3AHR7G.

Can ES3AHR7G replace standard fast recovery diodes like FR301 in existing designs?

ES3AHR7G can replace FR301 in many cases due to its superior 35 ns t_rr (vs. ~150 ns for FR301) and lower V_F (0.95 V vs. ~1.3 V), improving efficiency and reducing EMI. However, the DO-214AB (SMC) footprint differs from FR301's DO-41 axial package - requiring PCB layout change. Verify thermal design, as ES3AHR7G's lower R_θJA (47 °C/W) demands adequate copper area. ES3AHR7G is not a drop-in replacement but an upgrade path with layout adaptation.

What is the reverse leakage current specification for ES3AHR7G at elevated temperature?

ES3AHR7G specifies ≤ 500 µA reverse leakage current (I_R) at 100 °C and rated V_RRM, per Taiwan Semiconductor's electrical specifications table. At 25 °C, I_R is ≤ 10 µA. This temperature-dependent behavior is typical for silicon rectifiers and must be accounted for in high-temperature hold-up or standby circuits. The 500 µA value reflects worst-case conduction under thermal stress and is measured using a 30 ms pulse test, ensuring relevance to real-world transient conditions for ES3AHR7G.